Engine performance using vaporizing carburetor

A simple device for mixture preparation in a spark ignition engine (vaporiz ing carburetor) with the ability to provide the engine with a homogeneous a nd correctly proportioned combustible mixture for different operating condi tions has been tested in this study. This carburetor works on the principle of adiabatic vaporization of liquid gasoline fuel before introduction into the engine cylinder. This vaporization is achieved by passing atmospheric air, induced by engine suction, through the fuel. The performance and exhaust gas emissions of the engine were studied using different percentages of methanol-gasoline blends as well as pure gasoline, using both conventional and vaporizing carburetors. Results have shown tha t the vaporizing carburetor has numerous advantages over conventional carbu retors. The advantages include improvement in fuel economy and exhaust emis sion. which can be attributed to the leaning out of the mixture that could be prepared by using the vaporizing carburetor. The vaporizing carburetor w as found to be suitable for use with fuel blends. This is due to the high q uality of mixture preparation and mixing of different fuels. (C) 2000 Elsev ier Science Ltd. All rights reserved.